Hmm, big thanks for the clarification. I have the Mac version (App Store) of CTA3 Pro. I didn't uninstall that first, and installed the Pipeline upgrade. Now there are two versions. Perhaps because it was the App Store version of CTA3 that it was allowed to coexist with the direct download version of Pipeline?
So, would the next step be to uninstall everything an then reinstall Pipeline (and therefore reinstall all the extras)?
NB: When using the installer stubs (like for G3 Elastic Motions) I was given the choice of choosing which versions to install these for; CTA3 and/or Pipeline. It seems that I can happily launch Both versions. Im just not sure all the extras are available now in Pipeline, or in the right places – I can identify that same are available.